Wiring Guide
WIO BG770A (v1.0) - Grove Interface
Your Setup: Raspberry Pi 5 with SRD-05VDC relay modules connected via GPIO pins.
1Relay Module Connection
Connect your 4-slot relay module to the Digital pins on the WIO BG770A:
Slot 1
GND
Connect to GND (black wire)
Slot 2
3.3V
Connect to 3.3V (red wire)
Slot 3
D30 or D31
Control signal (GPIO)
Slot 4
GND (Optional)
Additional ground connection
2Digital Pin Reference
D31
GPIO / Digital I/O
D30
GPIO / Digital I/O
GND
Ground
3.3V
Power Supply
3Quick Tips
- •Always connect GND first to prevent electrical damage
- •Double-check all connections before powering on
- •Use D30 or D31 for relay control signals
- •The relay module draws power from 3.3V — ensure it's rated for this voltage